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Adds Python script to inject SVG tables into fonts, and adds SVG step to build script
This commit is contained in:
Miguel Sousa
parent
0160f39d56
commit
5312ce7856
191
addSVGtable.py
Executable file
191
addSVGtable.py
Executable file
@ -0,0 +1,191 @@
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#! /usr/bin/env python
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"""
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Adds an SVG table to a TTF or OTF font.
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The file names of the SVG glyphs need to match their corresponding glyph final names.
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"""
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import os
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import sys
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import re
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from distutils.version import StrictVersion
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try:
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from fontTools import ttLib, version
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from fontTools.ttLib.tables import S_V_G_
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except ImportError:
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print >> sys.stderr, "ERROR: FontTools Python module is not installed."
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sys.exit(1)
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# support for the SVG table was added to FontTools on Aug 28, 2013
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# https://github.com/behdad/fonttools/commit/ddcca79308b52dc36b24ef94cab4ab00c8e32376
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minFontToolsVersion = '2.5'
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if StrictVersion(version) < StrictVersion(minFontToolsVersion):
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print >> sys.stderr, "ERROR: The FontTools module version must be %s or higher.\n\
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You have version %s installed.\n\
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Get the latest version at https://github.com/behdad/fonttools" % (minFontToolsVersion, version)
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sys.exit(1)
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def readFile(filePath):
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f = open(filePath, "rt")
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data = f.read()
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f.close()
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return data
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def setIDvalue(data, gid):
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id = re.search(r"<svg.+?(id=\".*?\").+?>", data, re.DOTALL)
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if id:
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newData = re.sub(id.group(1), 'id="glyph%s"' % gid, data)
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else:
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newData = re.sub('<svg', '<svg id="glyph%s"' % gid, data)
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return newData
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def fixViewBox(data):
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viewBox = re.search(r"<svg.+?(viewBox=[\"|\'][\d, ]+[\"|\']).+?>", data, re.DOTALL)
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if not viewBox:
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return data
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fixedViewBox = 'viewBox=\"0 1000 1000 1000\"'
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fixedData = re.sub(viewBox.group(1), fixedViewBox, data)
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return fixedData
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def getGlyphNameFromFileName(filePath):
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folderPath, fontFileName = os.path.split(filePath)
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fileNameNoExtension, fileExtension = os.path.splitext(fontFileName)
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return fileNameNoExtension
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def processFontFile(fontFilePath, svgFilePathsList):
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# retrieve the font's glyph order, to determine the GID later
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font = ttLib.TTFont(fontFilePath)
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glyphOrder = font.getGlyphOrder()
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# first create a dictionary because the SVG glyphs need to be sorted in the table
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svgDocsDict = {}
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for svgFilePath in svgFilePathsList:
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gName = getGlyphNameFromFileName(svgFilePath)
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try:
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gid = glyphOrder.index(gName)
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except ValueError:
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print >> sys.stderr, "ERROR: Could not find a glyph named %s in the font %s." % (gName, os.path.split(fontFilePath)[1])
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continue
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svgItemsList = []
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svgItemData = readFile(svgFilePath)
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svgItemData = setIDvalue(svgItemData, gid)
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svgItemData = fixViewBox(svgItemData)
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svgItemsList.append(svgItemData)
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svgItemsList.extend([gid, gid])
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svgDocsDict[gid] = svgItemsList
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# don't do any changes to the source OTF/TTF font if there's no SVG data
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if not svgDocsDict:
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return
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svgGIDsList = svgDocsDict.keys()
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svgGIDsList.sort()
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svgDocsList = [svgDocsDict[index] for index in svgGIDsList]
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svgTable = S_V_G_.table_S_V_G_()
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svgTable.docList = svgDocsList
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svgTable.colorPalettes = None
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font['SVG '] = svgTable
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# FontTools can't overwrite a font on save,
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# so save to a hidden file, and then rename it
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# https://github.com/behdad/fonttools/issues/302
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folderPath, fontFileName = os.path.split(fontFilePath)
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fileNameNoExtension, fileExtension = os.path.splitext(fontFileName)
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newFontFilePath = os.path.join(folderPath, "%s%s%s" % ('.', fileNameNoExtension, fileExtension))
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font.save(newFontFilePath)
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os.rename(newFontFilePath, fontFilePath)
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def validateSVGfiles(svgFilePathsList):
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"""
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Light validation of SVG files.
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Checks that:
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- there is an <xml> header
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- there is an <svg> element
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"""
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validatedPaths = []
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for filePath in svgFilePathsList:
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# skip hidden files (filenames that start with period)
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fileName = os.path.basename(filePath)
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if fileName[0] == '.':
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continue
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# read file
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data = readFile(filePath)
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# find <xml> header
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xml = re.search(r"<\?xml.+?\?>", data)
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if not xml:
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print "WARNING: Could not find <xml> header in the file. Skiping %s" % (filePath)
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continue
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# find <svg> blob
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svg = re.search(r"<svg.+?>.+?</svg>", data, re.DOTALL)
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if not svg:
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print "WARNING: Could not find <svg> element in the file. Skiping %s" % (filePath)
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continue
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validatedPaths.append(filePath)
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return validatedPaths
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def getFontFormat(fontFilePath):
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# these lines were scavenged from fontTools
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f = open(fontFilePath, "rb")
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header = f.read(256)
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head = header[:4]
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if head == "OTTO":
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return "OTF"
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elif head in ("\0\1\0\0", "true"):
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return "TTF"
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return None
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def run():
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fontFilePath = os.path.realpath(sys.argv[1])
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svgFolderPath = os.path.realpath(sys.argv[2])
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# Font file path
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if os.path.isfile(fontFilePath):
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if getFontFormat(fontFilePath) not in ["OTF", "TTF"]:
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print >> sys.stderr, "ERROR: The path is not a valid OTF or TTF font."
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return
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else:
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print >> sys.stderr, "ERROR: The path to the font is invalid."
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return
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# SVG folder path
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if os.path.isdir(svgFolderPath):
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svgFilePathsList = []
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for dirName, subdirList, fileList in os.walk(svgFolderPath): # Support nested folders
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for file in fileList:
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svgFilePathsList.append(os.path.join(dirName, file)) # Assemble the full paths, not just file names
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else:
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print >> sys.stderr, "ERROR: The path to the folder containing the SVG files is invalid."
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return
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# validate the SVGs
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svgFilePathsList = validateSVGfiles(svgFilePathsList)
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if not svgFilePathsList:
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print >> sys.stderr, "WARNING: No SVG files were found."
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return
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processFontFile(fontFilePath, svgFilePathsList)
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if __name__ == "__main__":
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if len(sys.argv) != 3:
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print "To run this script type:\n python %s <path to input OTF/TTF file> <path to folder tree containing SVG files>" % sys.argv[0]
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else:
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run()
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7
build.sh
7
build.sh
@ -4,6 +4,9 @@ family=SourceCodePro
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romanWeights='Black Bold ExtraLight Light Medium Regular Semibold'
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italicWeights='BlackIt BoldIt ExtraLightIt LightIt MediumIt It SemiboldIt'
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# path to Python script that adds the SVG table
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addSVG=$(cd $(dirname "$0") && pwd -P)/addSVGtable.py
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# clean existing build artifacts
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rm -rf target/
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mkdir target/ target/OTF/ target/TTF/
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@ -13,6 +16,8 @@ do
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makeotf -f Roman/$w/font.ufo -r -o target/OTF/$family-$w.otf
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makeotf -f Roman/$w/font.ttf -r -o target/TTF/$family-$w.ttf
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rm Roman/$w/current.fpr # remove default options file from the source tree after building
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$addSVG target/OTF/$family-$w.otf svg/
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$addSVG target/TTF/$family-$w.ttf svg/
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done
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for w in $italicWeights
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@ -20,4 +25,6 @@ do
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makeotf -f Italic/$w/font.ufo -r -o target/OTF/$family-$w.otf
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makeotf -f Italic/$w/font.ttf -r -o target/TTF/$family-$w.ttf
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rm Italic/$w/current.fpr # remove default options file from the source tree after building
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$addSVG target/OTF/$family-$w.otf svg/
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$addSVG target/TTF/$family-$w.ttf svg/
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done
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